Lull 6K Service Manual - Manual (Page 152)

Supply, Pressure, and Return Hydraulics
5-8 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Filling Hydraulic Reservoir
Preferred Method
CAUTION: Do not fill reservoir through the breather opening. The
hydraulic system can become contaminated.
Oil must be filtered through the return filter to ensure purity.
Contamination, even small amounts, can permanently damage hydraulic
system components and void the warranty.
Fig. 5-6: Recommended Reservoir Filling Method
(Ref. Fig. 5-6) The following is the recommended filling procedure for the
hydraulic reservoir:
1. The machine must be parked on a level surface and the frame must be
level.
2. Retract all cylinders except frame tilt cylinder. Apply the park brake and
stop the engine.
3. Clean area around hex cap (Item 1) on the cover (Item 2). Loosen and
remove the hex cap.
4. Provide a hydraulic hose of suitable length to run between hydraulic oil
fill pump and male JIC (37°) filler fitting (Item 4), in return filter housing
cover. The reservoir end of the hose must be fitted with a 1-1/16-12 JIC
(37°) female hose fitting.
5. Assemble hose (Item 3) to reservoir filler fitting (Item 4) and tighten.
6. Fill reservoir until oil level in sight gauge is at HIGH mark. Use
hydraulic oil as specified in “Fluid and Lubricant Specifications” in
Section 3.
K
1
015
1
2
3
4
# Description
1 Hex Cap
2 Cover
# Description
3 Hydraulic Hose
4 Male JIC (37°) Filler Fitting